Final Showdown 
Instant
Spree (Choose one or more additional costs.)
+ 
— All creatures lose all abilities until end of turn.
+ — Choose a creature you control. It gains indestructible until end of turn.
+ 
— Destroy all creatures.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL